Winchester Model 70 in 7mm Rem. Mag

My B.I.L is looking to sell this rifle. I'm interested, but have no idea what it's worth. Serial # is G1122XXX, which puts it post '64, mid 70's from what info I could find. The end of the barrel is tapped, I would guess to mount iron sights?
I would appreciate any info you guys can give me.
I apologize for the picture size, don't know how to resize them.

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Those years were not good times for Winchester and in spite of the famous name, those guns are pretty much on the low end of the totem pole for the Model 70. That, plus the rust and general poor condition would result, IMHO, in a value of around $200-250.